ExecutionSpeed

I think we might have to add an `image.dispose()` to the `classifyGif` operation to avoid memory leak. https://github.com/infinitered/nsfwjs/blob/58844e357b5c684ccf8a68f94094e79f0e246b33/src/index.ts#L244-L245 Possibly adding the `image.dispose()` below here post `classify(...)` of each frame?